Stone-sawing machine



(No Model.) 3 Sheets-Sheet 1.

G. M. VIERNOW. STONE SAWING MACHINE.

No. 372,996. 4 Patented Nov. 8, 1887.

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N. PETERS. Plwhrmlwgraphar. Wahingion. 0.0.

3 Sheets -She-et 2.

- (No Model.)

M. VIERNOW; STONE SAWING MACHINE.

N. PETERS. Fhntu-Lilhogmphar. Washington. a a

(No Model.) 3 SheetsSheet 3.

G. M. VIERNOW. STONE SAWING MACHINE.

No. 372,996. r Patented Nov.- 8. 1887.

440mg I mnza 16521014,

UNITED STATES PATENT OFFICE.

GUSTAV M. VIERNOW, on ST. LOUIS, MIs soUnI.

STONEI-SAWING MACHINE.

EPECIPICATION forming part of Letters Patent No. 372,996, dated November 8, 1887.

, Application filed May 7, 1887. Serial No. 237,447. (No model.)

To aZZ whom it may concern.-

Be it known that I, GUSTAV M. VIERNOW, of the city of St. Louis, in the State ofMissouri, have invented a certain new and .useful Improvement in Stone-Sawing Machines,ofwhich the following is a full,clcar, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure I is a plan or top view of myma chine, showing the arrangement of the gangsaws in their guide-frames, the transverse shaft to which they are secured, and the pitmanrods that connect the gang with the eccentric crank-wheel that operates them. Fig. II is a detail side e1evation,'showing movement of the pitman-rod, its means of attachment to the saw and to the eccentric crank-wheel that operates it, with the spring friction belt' that runs the wheel. It also shows the means of vertical adjustment of the saw as it follows up its work. Fig. III is a detail showing the means of attaching the saw on the rod that connects the gang. Fig. IV is a vertical section on line IV IV, Fig. V, showing the saw withitsvertical arms for steadying it in the guide-frame and distributing the cutting-sand along the saw-cut in the stone. Fig. Visa vertical section showing the guideframe elevated on its pedestals and the position of the saws within the guide-plates. I

My invention relates to machines for sawing stone; and the invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Referring to thedrawings, in which similar figures of reference indicate like parts in all the views, 1 represents the side sills of the frame that carries the machine.

2 are the'forward posts, and 3 the rear posts; 4, the main beams, and 5 the cross-beams; 6, the ties, 7 the cross-braces, and 8 the rear braces, of said frame.

9 are the crane-beams r gang-bearers, the feet of which are secured to thebeams and their upper ends supported on the'extension 10 of the forward posts.

11 represents the saws, which are bevelpointed on the under side at 12, and having vertical arms 13, that rise from near the middle of the saw,and are integral with the saw-plate. The saw-plates at their fast ends are secured to the arms 14 of sleeve-brackets 15, to which they are fastened by bolts 16, secured by nuts 17. The sleeves of said brackets that carry the saws are adjusted on the gang-shaft 18 at distances apart to correspond with the thickness of the slabs to be cut, and the sleeves are secured to the gangshaft by collars with set screws 19, thus securing the saw to the gang its brace-rod 21, are provided with clips 22 at their forward end, which grasp the gang-rod that passes through them. Wedges 23, that pass through the clips back of the gang-rod, take up the slack at the connections of said pitman with the rod. The clips 24 on the rear ends of the pitman engage with the wrist pins 25 on the crank-wheels 26, the slack being taken up by wedges 27. The crank wheels are rigidly secured to the same shaft, 28, that carries the drivepulley 29, so that as the pulley is driven by the belt the crankwheels rotate at the same speed and carry the wrist-pins, with the pitman, around with them, said pitman being thus actuated to work the shaft and the saws that it carries.

The drive-belt,which may be driven by any suitable power, has a tightener or spring-ten sion attachment consisting oftwo pairs ofarms, 31, that are pivoted on the same shaft, 28, that carries the pulley and crank-wheels, said arms being united by spiral springs 32, and carry idlers 33 on their outer ends, said idlers running on the pivot-rods 3,4, that connect the twin arms, press on the drive-belt, and thus increase its tension on the pulley- 35 represents vertical feed-screw shafts, the feet of which are seated on the side sills, from which they pass upward to and through the side beams, against which shoulders'36 engage to keep the screw from lifting.

37 represents yokes,which are provided with internal screws that engage around the feed screw shafts and uphold the shaft28, thatcan ries the drive-pulley, crank-wheel, and pitman.

I will now proceed to describe my feeding movement by which the pitman-rods and the gang-saw shafts they work are lowered to their work as the saws effect their cut. The top ends of the vertical feed-screw shafts 85, after passing through the beams, are provided with bevel-pinions 38, that mesh with bevel-pinions 39 on the horizontal shaft 40, that runs transverse to the frame, and has bearings at 41 on the joist-bearers 42, which pass from the rear cross-beam to the tie 43, that connects the rear ends of the side beams. The shaft 40 is also provided with a bevelpinion, 44,- rigidly secured thereto, which meshes into a bevel-pinion, 45, on the end of the actuating-shaft 46, which has bearings 47 on studs 48, that are secured to the cross beams of the frame. A handwheel, 49, on the said shaft operates the same, and through its bevel-pinion gearing turns the vertiealfeed-screw shafts so as to enable the operator to lower the rear end of the pitman as the saw follows down in its saw-cut. The shaft 40 is also provided with a sprocketwheel, 50, rigidly secured thereto, an endless chain, 51, from which engages around a pulley or sprocket-wheel, 52, that is rigidly se cured to the windlassshaft 53. Two ropes, 54, secured to the said shaft wind around it at their fast end and pass over idlers 55, that run on pins 56 in the slots 57 in the crane-beams 9, through which the ropes pass on their way to the pulleys 58, that run on pins 59,which connect the bracket-arms 60, the lower end of which engage around the saw-gang shaft 18 to hold up the same. The rope, after passing around said pulley, ext-ends upward to the end of the crane-beam, to which it is fastened by the staple 61.

It will be seen that by the above-described device when the handwheel 49 is turned in the right direction it operates simultaneously both its bevel-geared connections with the vertical feed-screw to lower the rear end of the pitman, and by its combined gear and tackle connections with the crane to effect the lowering of the saw-gang shaft at the same time, so that by the one operation of turning the hand-wheel the saws are lowered to its feed; also, after having made its out by the reverse action of the hand-wheel the gang is raised for effecting another cut. The gearing and tackle are so relatively arranged that both ends of the pitman are lowered and raised at the same rate.

62 represents the guideframe, which is set on the rock or stone 63 that is to be sawed, and consists of the angle-irons 64, on which rests the spacing-timbers 65, which are secured to the angle-irons by bolts 66, the heads 67 of which serve as feet to support the guide-frame slightly above the stone. Nuts 68 are secured down on said bolts tight on the spacing-timvwhen required.

her. Two posts, 69, on each side of the guideway support elevated guide-boards 7 O, that are secured by bolts 71 to the head of the posts and extend as far as the track of the vertical arm 18 and reaches in its movements to guide and steady said arm, and, in conjunction with the braces 72 from the posts to the angle-irons and their foot-bolts 77, steady the guide-frame. Upper spacer-strips, 73, are bolted at the heads of the posts parallel with the bottom spacers, 65.

Vhcn it is required to saw either thicker or thinner slabs, the spacing-timbers are n nbolted and removed and other spacers ofthe requisite length to correspond with the required thick ness of the slab are bolted on in their place.

74 represents an extension at one end of the shaft 40, outside the bevel-pinion 39, on which is rigidly secured the pulley 75, on which a drive-belt, 76, engages. This belt connects with and is driven by the same power that works the gang-saws, and .is used, after the saws have cut through, to elevate the gang ready for a fresh out. It is evident that said shaft, if turned by power, as described above, and in the right direction, will elevate the gangs in the same manner as if turned by the hand-shaft 46.

Althoughit would be needless to apply other than hand-power in lowering thefeed at short movements, it is a great saving of labor to elevate for a recut by the same power that works the gangs.

The machine is intended especially for use in cutting from the solid rock in the quarry, where saws operated from both ends could not work; but it is also adapted for sawing blocks The vertical arm extending up from the middle of the saw acts as a dis tributer when sharp cutting-sand is fed into the cut for hastening the action of the saw on the stone. It also, as it works between the elevated bars of the guideway, steadies the movement of the saw, and, by adding weight to the same, hastens the cut. The windlassshaft 53 has bearings in the journal-boxes 78, which, with their caps 7.), are securely fastened to the feet ofthe crane-beams by the bolts 80. The sleeve-brackets 15, that couple the saws to the gang-shaft, have a loose vertical bearing, which is found necessary for the successful working of the saws to allow them a lively action and free vertical movement and following in their cut, but are rigidly restrained by the eollars and set-screws 1.9 from endwise movement on said shaft.

Some of the advantages of my stone-sawing machine may be stated as follows: First, the combined tackleand geared system of feeding as the saw advances in its out, in conjunction with the reverse feed for elevating the gang, is a ready means by which to operate the same; second, the means of driving the gang-saws by the drive-pulley, in conjunction with the crank-wheels operating on the same shaft and the spring-tension for enforcing the friction of the drive band; third, the gang-shaft on which are adjusted the saws and their meansof loose Vertical adjustment by their sleevebrackets, which are rigidly laterally confined from endwise movement on the gang-shaft by the collars and set screws that hold them; and, fourth, a considerable advantage is experienced from the overhung bevel edge of the saw-points, by their riding over the hard particles embedded in rocks, where a square or underhung point would bcimperatively held thereby, and endanger thebreaking or violent straining of the saw; and, also, as the overhung bevel-point of the saw at the end of the cut strikes the short upward incline the front end of the saw is elevated and the 'sand and water flows along the saw-channel and distributes the sand, and at the same time the vertical arm of the saw-blade stillfurthcr aids the distribution.

I claim as myinyentiou 1. In a stone-sawing machine, the combination, with the frame having mounted thereon crane-beams and a vertically-adjustable drivepulley, of one or more saws mounted on a u gangshaft, said gang-shaft being supported from the crane-beams, a drive-shaft actuated by the pulley, and drivingconnections between the saws and the drive-shaft, substantially as herein set forth.

2. In a stone-sawing machine, the combination of the drive-pulley 29, operated by the drive-belt 30, with the spring-tension arms 31, connected by the spiral springs 32, which, as the idlers 33, having bearings on the coup ling-rods of the arms, press on the drive-belt, cause an elastic tension of the belt on the drive-pulley, substantially as described, and for the purpose set forth.

3. In a stone sawing machine, the combination of the drive-pulleyoperated by the drivebelt under spring-tension, turning'the combined shaft of said pulley, and the crankwheels that operate the pitman-rods, the screwyokes 37, in connection with which said pitman-rods are supported at their rear ends on the feed-screws 35, and the adjustable tackle thatsupports the front ends of the pitman-rods with the gang-saws, the same being operated to feed the saws by the hand-wheel 49, and shaft 46 with its bevel-geared connections with the feed screw and its gear and tackle connections with the gang, substantially as described, and for the purpose set forth.

4. In astone-sawing machine, the combination of the drive-pulley and its spring-tension device on the drive-belt, the combined geared and tackle adjustable feed device, o'perated by the hand-wheel 49, the saws adjustably secured to the gang-shaft by the sleevebrackets, which allow loose vertical movement on said shaft for the free movement of the saws in their cuts, and are prevented from endwise movement on said shaft by the collars and setscrews 19, substantially as described, and for the purpose set forth.

5. In a stone-sawing machine, the combination of the saws adjustably secured on the gang-shaft, said saws having vertical arms 13, rising from the middle of the blade, that pass between the angle-irons 64, and the strips of the guide-frame 62, to steady the saws and distribute the sand and water in the cut, substantially as and for the purpose set forth.

6. In a stone-sawing machine, the combination of the saws adjustably secured to the gang-shaft, said saws having overhung bevelpoints inclined upward and arranged, as they strike the upward incline at the end of their cut, to lift the saws from their bed and allow the sand and water to flow along the channel, substantially as described, and for the purpose set forth.

7. In a stonesawing machine, the combination of the saws with sleeve-brackets adj ustably secured and fastened by collars and setscrews on the gang-shaft, and said saws working through the tracks of the guide-frame, made with angle-irons 64 and strips 70, elevated 011 posts 69, with braces 72 on each side ofthe tracks, and having spacing-strips 65 and 73 to regulate the distance apart of the'cuts and consequent thickness of the slabs to be sawed, substantially as described, and for the purpose set forth.

8. In a stone-sawing machine, the combination of the pitman-rods secured to screwthreaded yokes 37, that engage around the vertical feed-screws, said feed-screws operated by the hand-wheel 49, that turns the shaft 46, a bevel-pinion on which meshes with its corresponding bevel-pinion on the shaft 40, which has bevel-pinions 39, that mesh with bevel pinions 38 on the heads ofv the feed-shafts, which, with the geared and tackle feed attached to and suspended from the crane-beams 9, to support the gang when operated by said hand-wheel, feed the saws to their work, substautially as and for the purpose set forth.

9. In a stone-sawing machine, the combination of the feeding device consisting of the vertical screw-shafts, on which are engaged the screw-threaded yokes that support the rear of the pitman-rods, the bevel-pinion connections of said shafts via the shafts 40 and 46, with the hand-wheel 49 and the gear and tackle feed-connection from said shaft 40, via the sprocket-wheels 50, endless chain 51, pulley 52, ropes 54, and crane-beam'9, with its idlers 56 and gang-pulleys 58 to support the gang, all operated by said hand-wheel to feed the gang to its work, 7 with the extension 74 of shaft 40, and drive-pulley 75, on which the drivebelt 76 engages, after the saws have effected their cut, for the returnelevation of the gang, ready for a renewed cut, substantially as and for the purpose set forth.

GUSTAV M. VIERNOVV.

In presence of BENJN. A. KNIGHT. SAML. KNIGHT.

IIO 

